As long as you are using only one device aka pc
It will use the same amount
The data comes from the websites visited
It doesn't make any difference if the pc is connected via USB to phone or Wi-Fi hotspot on phone
The website data will be the same amount
USB is one pc only
Wi-Fi means you could connect several devices to the internet
Several devices will use more than one
I can explain it to you.
But I Can Not understand it for you !
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Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s